Borsuk S. S. Spinning materials under a microscope. In Russian (ask us if in doubt)/Borsuk S. S. Pryadilnye materialy pod mikroskopom. 84 microphotographs of the most important plant and animal fibres with explanatory text. Compiled by S. S. Borsuk, Teacher of the Intensive Academy of Engineering and Technology. Type R. Golike and A. Wilborg. 1912. 22 s. SKUalb7cd454a28f2933a1.